Chris S.
Well-known member
I bought a tiny tach to check my outboards rpm's. There is different settings based on how times your spark plug sparks per revolution. So how many times does a spark plug spark per revolution on my 15hp evinrude? My guess is 1 time per revolution. There is an option for 1 time, 2 times or 1 every other revolution. Thanks for the help.
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